Zodiac or oven control

No power at all to oven controls, display is blank. I was told that it was "the board" by a tech. couldn’t pin him down as to which one. Looking at the forum posts I noticed there are two control units that could go, the Zodiac control #AP3009635 and the oven control #AP3873511. They are in competely two different locations though. Any troubleshooting ideas to make this easy. I’m a computer tech and not an appliance tech so I’m not sure how to go about troubleshooting this device.
Thank you